<template>
	<view>
		<view class="search-box">
		  <uni-search-bar @input="input" cancelButton="none" :radius="100"></uni-search-bar>
		</view>
    <!-- 搜索建议列表 -->
    <view class="sugg-list" v-if="searchResult.length !== 0">
        <view class="sugg-item" v-for="(item, i) in searchResult" :key="i" @click="gotoDetail(item)">
          <view class="goods-name">
            {{ item.goods_name }}
          </view>
          <uni-icons type="forward" size="16"></uni-icons>
        </view>
    </view>
    
    <!-- 搜索历史 -->
    <view class="history-box" v-else>
      <!-- 标题区域 -->
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="16" @click="clearHistory"></uni-icons>
      </view>
      <!-- 列表区域 -->
      <view class="history-list">
          <uni-tag :text="item" v-for="(item, i) in histories" :key="i" @click="gotoGoodsList"></uni-tag>
        </view>
      </view>
    </view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer: null,
        kw: '',
        searchResult: [],
        historyList: ['a', 'app', 'apple']
			};
		},
    methods: {
      input(e) {
        clearTimeout(this.timer)
        this.timer = setTimeout(() => {
          this.kw = e.value
          this.getSearchList()
        }, 500)
      },
      async getSearchList() {
        if(this.kw.length === 0) {
          return this.searchResult = []
        }
        const {data : res} = await uni.$http.get('/api/public/v1/goods/search', {query: this.kw})
        if(res.meta.status !== 200) return uni.$showMsg()
        this.searchResult = res.message.goods
        this.saveSearchHistory()
      },
      gotoDetail(item) {
        uni.navigateTo({
          url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
        })
      },
      saveSearchHistory() {
        const set = new Set(this.historyList)
        
        set.delete(this.kw)
        set.add(this.kw)
        
        this.historyList = Array.from(set)
        
        uni.setStorageSync('kw', JSON.stringify(this.historyList))
      },
      clearHistory() {
        this.historyList = []
        uni.setStorageSync('kw', '[]')
      },
      gotoGoodsList() {
        uni.navigateTo({
          url: '/subpkg/good_list/good_list?query=' + this.kw
        })
      }
    },
    onLoad() {
      this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
    },
    computed: {
      histories() {
        return [...this.historyList].reverse()
      }
    }
	}
</script>

<style lang="scss">
.search-box {
  position: sticky;
  top: 0px;
  z-index: 999;
}

.sugg-list {
  padding: 0 5px;
  .sugg-item {
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    display: flex;
    text-align: center;
    justify-content: space-between;
    
    .goods-name {
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}

.history-box {
  padding: 0 5px;
  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }
  .history-list {
    display: flex;
    flex-wrap: wrap;
    
    .uni-tag {
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
